Health check command

[adriangb]

Is your feature request related to a problem? Please describe.

When deploying it's good to have some sort of healthcheck.

Describe the solution you'd like

A command (binary) like pgcat health <some connection info? that can be set up as an exec probe on k8s deployments.

Describe alternatives you've considered

Rebuilding the image myself to include e.g. psql so I can use that as a probe.
This has the con of requiring a rebuild on my end, bloating the image and having to figure out what username/password I'm going to use, etc. (probably the admin username/password makes sense).

[rmenn]

it has been added in #607 i dont believe there has been a release after, if you pull the latest image its present

root@a6f7cd205063:/etc/pgcat# which psql 
/usr/bin/psql

[adriangb]

Nice!